Majorly, lichens are the pollution indicators of
(A) CO
(B) Mercury
(C) NO2
(D) SO2
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Answer:
(D) SO2
Explanation:
- Lichens indicates the SO2 pollution.
- As lichens are affected by certain pollutants they are very good pollution indicators.
- Lichens grow only in areas which are free from pollution , they do not grown in areas which are polluted .
- Therefore they do not grow in SO2 polluted areas.
- Lichens have a symbiotic association between algae which is called as phycobiont and symbiotic association with fungi called as mycobiont component.
- Thus, they are good pollution indicators and the correct answer is SO2 pollution.
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